Use .Net 4.0 UserControl in .Net 2.0

Question

I created a UserControl in .Net 4.0 App, and now I need that UserControl in another App which is in .Net 2.0 environment. Is it possible to use my UserControl in the .Net 2.0 App (VS 2005)?

Rucksack

Answer 1

One does not simply use .NET 4 in an older environment.

Oceangoing

Thx for your answer, and I love that emotion LOL – Rucksack

Indeed, my pleasure. Atleast it is very clear what the answer is. :P But like @kaze said. If you don't use any features above .net2 you should recompile with .net 2.0 as the target platform. – Oceangoing

I'm using .net4 features, what i can think of is using web service to expose the various methods that i have in my user control. Sigh. – Rucksack

That might be an option, and else you might need to rewrite your control in .NET 2. And of course you might want to upgrade that environment to .NET 4. If that is not possible... I would just rage against my boss and convince him to switch over. :P – Oceangoing

the .Net 2 app is the core app that has been around for some time and grown into a size that we just don't have enough resources to upgrade at the moment. I don't really need the UserControl, what I need is the object and logic within it. I see no other option except relay them thru web service as for now :'( cry – Rucksack

And it just isn't possible to rewrite some of the .NET4 features into .NET2 features? – Oceangoing

Not quite possible as it seems. Sad. – Rucksack

Answer 2

No, but the other way around works, .net2 -> .net4

If you're not using any features above .net2, you could recompile with net2.0 as target platform.

Acceptable